1gdal_utilities(1) General Commands Manual gdal_utilities(1)
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6 gdal_utilities - GDAL Utilities A collection of GDAL related programs.
7 The following utility programs are distributed with GDAL.
9 · gdalinfo - Report information about a file.
11 · gdal_translate - Copy a raster file, with control of output format.
12 · gdaladdo - Add overviews to a file.
13 · gdalwarp - Warp an image into a new coordinate system.
14 · gdaltindex - Build a MapServer raster tileindex.
15 · gdalbuildvrt - Build a VRT from a list of datasets.
16 · gdal_contour - Contours from DEM.
17 · gdaldem - Tools to analyze and visualize DEMs.
18 · rgb2pct - Convert a 24bit RGB image to 8bit paletted.
19 · pct2rgb - Convert an 8bit paletted image to 24bit RGB.
20 · gdal_merge - Build a quick mosaic from a set of images.
21 · gdal2tiles - Create a TMS tile structure, KML and simple web viewer.
22 · gdal_rasterize - Rasterize vectors into raster file.
23 · gdaltransform - Transform coordinates.
24 · nearblack - Convert nearly black/white borders to exact value.
25 · gdal_retile - Retiles a set of tiles and/or build tiled pyramid
26 levels.
27 · gdal_grid - Create raster from the scattered data.
28 · gdal_proximity - Compute a raster proximity map.
29 · gdal_polygonize - Generate polygons from raster.
30 · gdal_sieve - Raster Sieve filter.
31 · gdal_fillnodata - Interpolate in nodata regions.
32 · gdallocationinfo - Query raster at a location.
33 · gdalsrsinfo - Report a given SRS in different formats. (GDAL >=
34 1.9.0)
35 · gdalmove - Transform the coordinate system of a file (GDAL >= 1.10)
36 · gdal_edit - Edit in place various information of an existing GDAL
37 dataset (projection, geotransform, nodata, metadata)
38 · gdal_calc - Command line raster calculator with numpy syntax
39 · gdal_pansharpen - Perform a pansharpen operation.
40 · gdal-config - Get options required to build software using GDAL.
41 · gdalmanage - Identify, copy, rename and delete raster.
42 · gdalcompare - Compare two images and report on differences.
44 Access an existing file to read it is generally quite simple. Just
45 indicate the name of the file or dataset on the command line. However,
46 creating a file is more complicated. It may be necessary to indicate
47 the the format to create, various creation options affecting how it
48 will be created and perhaps a coordinate system to be assigned. Many of
49 these options are handled similarly by different GDAL utilities, and
50 are introduced here.
51 -of format
52 Select the format to create the new file as. The formats are
53 assigned short names such as GTiff (for GeoTIFF) or HFA (for Erdas
54 Imagine). The list of all format codes can be listed with the
55 --formats switch. Only formats list as '(rw)' (read-write) can be
56 written.
57 Starting with GDAL 2.3, if not specified, the format is guessed from
58 the extension (previously was generally GTiff for raster, or ESRI
59 Shapefile for vector).
60 -co NAME=VALUE
61 Many formats have one or more optional creation options that can be
62 used to control particulars about the file created. For instance,
63 the GeoTIFF driver supports creation options to control
64 compression, and whether the file should be tiled.
65 The creation options available vary by format driver, and some simple
66 formats have no creation options at all. A list of options supported
67 for a format can be listed with the '--format <format>' command line
68 option but the web page for the format is the definitive source of
69 information on driver creation options. See format specific
70 documentation for legal creation options for each format
71 -a_srs SRS
72 Several utilities, (gdal_translate and gdalwarp) include the
73 ability to specify coordinate systems with command line options
74 like -a_srs (assign SRS to output), -s_srs (source SRS) and -t_srs
75 (target SRS).
76 These utilities allow the coordinate system (SRS = spatial reference
77 system) to be assigned in a variety of formats.
78 · NAD27/NAD83/WGS84/WGS72: These common geographic (lat/long)
79 coordinate systems can be used directly by these names.
80 · EPSG:n: Coordinate systems (projected or geographic) can be selected
81 based on their EPSG codes, for instance EPSG:27700 is the British
82 National Grid. A list of EPSG coordinate systems can be found in the
83 GDAL data files gcs.csv and pcs.csv.
84 · PROJ.4 Definitions: A PROJ.4 definition string can be used as a
85 coordinate system. For instance '+proj=utm +zone=11 +datum=WGS84'.
86 Take care to keep the proj.4 string together as a single argument to
87 the command (usually by double quoting).
88 · OpenGIS Well Known Text: The Open GIS Consortium has defined a
89 textual format for describing coordinate systems as part of the
90 Simple Features specifications. This format is the internal working
91 format for coordinate systems used in GDAL. The name of a file
92 containing a WKT coordinate system definition may be used a
93 coordinate system argument, or the entire coordinate system itself
94 may be used as a command line option (though escaping all the quotes
95 in WKT is quite challenging).
96 · ESRI Well Known Text: ESRI uses a slight variation on OGC WKT format
97 in their ArcGIS product (ArcGIS .prj files), and these may be used in
98 a similar manner to WKT files, but the filename should be prefixed
99 with ESRI::. For example 'ESRI::NAD 1927 StatePlane Wyoming West FIPS
100 4904.prj'.
101 · Spatial References from URLs: For example
102 http://spatialreference.org/ref/user/north-pacific-albers-conic-
103 equal-area/.
104 · filename: The name of a file containing WKT, PROJ.4 strings, or
105 XML/GML coordinate system definitions can be provided.
107 All GDAL command line utility programs support the following 'general'
108 options.
109 --version
110 Report the version of GDAL and exit.
111 --formats
112 List all raster formats supported by this GDAL build (read-only and
113 read-write) and exit. The format support is indicated as follows:
114 'ro' is read-only driver; 'rw' is read or write (i.e. supports
115 CreateCopy); 'rw+' is read, write and update (i.e. supports
116 Create). A 'v' is appended for formats supporting virtual IO
117 (/vsimem, /vsigzip, /vsizip, etc). A 's' is appended for formats
118 supporting subdatasets. Note: The valid formats for the output of
119 gdalwarp are formats that support the Create() method (marked as
120 rw+), not just the CreateCopy() method.
121 --format format
122 List detailed information about a single format driver. The format
123 should be the short name reported in the --formats list, such as
124 GTiff.
125 --optfile file
126 Read the named file and substitute the contents into the command
127 line options list. Lines beginning with # will be ignored. Multi-
128 word arguments may be kept together with double quotes.
129 --config key value
130 Sets the named configuration keyword to the given value, as opposed
131 to setting them as environment variables. Some common configuration
132 keywords are GDAL_CACHEMAX (memory used internally for caching in
133 megabytes) and GDAL_DATA (path of the GDAL 'data' directory).
134 Individual drivers may be influenced by other configuration
135 options.
136 --debug value
137 Control what debugging messages are emitted. A value of ON will
138 enable all debug messages. A value of OFF will disable all debug
139 messages. Another value will select only debug messages containing
140 that string in the debug prefix code.
141 --help-general
142 Gives a brief usage message for the generic GDAL command line
143 options and exit.
144GDAL Tue Mar 3 2020 gdal_utilities(1)